TY - JOUR
T1 - Lifecycle Cost Analysis of Recycled Asphalt Pavements
T2 - Determining Cost of Recycled Materials for an Urban Highway Section
AU - Hasan, Umair
AU - Whyte, Andrew
AU - Al Jassmi, Hamad
AU - Hasan, Aisha
N1 - Funding Information:
This research project is supported by an Australian Government Research Training Program (RTP) scholarship.
Publisher Copyright:
© 2022 by the authors.
PY - 2022/6
Y1 - 2022/6
N2 - Growing demand for road infrastructures and accompanying environmental footprint calls for the replacement of pavement materials with recycled options. The complexities in real-world usability are dependent upon project-specific characteristics and are affected by budgetary constraints of local governmental agencies, material applicability, and climatical conditions. This study conducts a comprehensive lifecycle cost analysis (LCCA) of an urban highway section “E10” in the hot Middle Eastern climate of Abu Dhabi, where virgin asphalt usage is dominant, using actual cost data under multiple scenarios and recycled construction waste (RCW) usage across aggregate layers and recycled asphalt pavement (RAP) across wearing, binder, and asphalt base courses. Blast furnace slag as partial cement replacement for road concrete works is also analysed. Impacts across all lifecycle stages from initial earthworks and construction to routine maintenance and operation were compared. Results found that cost of sustainable construction is lower. Cost reduction was highest for RAP and RCW usage, particularly when the usage was accumulated. The optimum cost scenario used 25% RCW in the sub-base, 80% RCW in the unbound base, 25% warm-mix asphalt (WMA) RAP in the asphalt base, 15% warm-mix RAP in the binder and wearing courses, and 65% slag for concrete roadworks and resulted in USD 2.6 million (15%) cost reduction over 30 years from 2015 to 2045.
AB - Growing demand for road infrastructures and accompanying environmental footprint calls for the replacement of pavement materials with recycled options. The complexities in real-world usability are dependent upon project-specific characteristics and are affected by budgetary constraints of local governmental agencies, material applicability, and climatical conditions. This study conducts a comprehensive lifecycle cost analysis (LCCA) of an urban highway section “E10” in the hot Middle Eastern climate of Abu Dhabi, where virgin asphalt usage is dominant, using actual cost data under multiple scenarios and recycled construction waste (RCW) usage across aggregate layers and recycled asphalt pavement (RAP) across wearing, binder, and asphalt base courses. Blast furnace slag as partial cement replacement for road concrete works is also analysed. Impacts across all lifecycle stages from initial earthworks and construction to routine maintenance and operation were compared. Results found that cost of sustainable construction is lower. Cost reduction was highest for RAP and RCW usage, particularly when the usage was accumulated. The optimum cost scenario used 25% RCW in the sub-base, 80% RCW in the unbound base, 25% warm-mix asphalt (WMA) RAP in the asphalt base, 15% warm-mix RAP in the binder and wearing courses, and 65% slag for concrete roadworks and resulted in USD 2.6 million (15%) cost reduction over 30 years from 2015 to 2045.
KW - granulated blast furnace slag
KW - highways
KW - lifecycle cost analysis
KW - recycled asphalt pavements
KW - scenario analyses
UR - http://www.scopus.com/inward/record.url?scp=85143749069&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85143749069&partnerID=8YFLogxK
U2 - 10.3390/civileng3020019
DO - 10.3390/civileng3020019
M3 - Article
AN - SCOPUS:85143749069
SN - 2673-4109
VL - 3
SP - 316
EP - 331
JO - CivilEng
JF - CivilEng
IS - 2
ER -